London Inn Drive-in Onion Rings

4 jumbo onions
3 cups flour
1 teaspoon baking soda
1 teaspoon baking powder
1 egg
3 teaspoons Lawry's seasoned salt
1 teaspoon celery salt
1 teaspoon garlic salt
1 teaspoon onion salt
1 pint milk

Peel and slice onions into 1/2 inch thickness. Pop out centers and rings. Put all batter ingredients in mixer bowl and blend thoroughly. [Batter is thicker than pancake mix.] Coat onion slices well. Fry rings until golden brown, salt with Lawry's seasoned salt.

Source: Huck Andresen